Oil remained near a five-month high, as threats to global supply posed by tougher US restrictions on Russian flows and potential trade tariffs from the incoming Trump administration loomed.
West Texas Intermediate (WTI) was steady near $79 a barrel after jumping more than 6% over the previous two sessions, while Brent closed above $81 a barrel.
The US imposed its most aggressive sanctions yet on Russia's oil industry on Friday, targeting major exporters, insurers and more than 150 tankers.
At the same time, 10 European countries are also pushing for tougher sanctions.
Meanwhile, Alberta Premier Danielle Smith warned of the possibility of US tariffs once Donald Trump takes office next week without an oil exemption.
More than half of US crude imports come from Canada, mostly from Alberta.
